Nice work Dawg!
To obtain this achievement you must get 2500 assists.... Yes 25 hundred with 4 digits. Im here to tell you that I have THE fastest solution depending on what you have to do it, your best and fastest way to get this done is by having 3 Xbox One controllers. If you don't have 3 xbox one controllers I have a few other methods for you, the more controllers you have the easier this is for you.
Another thing is I have found out how to get this achievement without even having to be playing!3 Controllers method:
(45:00 - 1:00:00 time)
Forge, Halo 2, Lockdown, no shields, account and 1 dummy on same team while the 2nd dummy on the opposite. Once you get into the map pick up a respawn point and click
, scroll down and click Destroy all of these
. Make 1 respawn spot on the corner of an edge on the tower with the lift, by doing this all the dead bodies and weapons will fall off the map upon the dummy dying and prevent the game from dropping due to lag (gets rid of the weapon when it goes off the ledge instead of them stacking up on the ground). Then you want to go into the human weapons and build a human turret (doesn't matter which one), place the turret near the spawn point. Then put a Needler on the ground and make its respawn at 1 second, nothing else really matters. Put your main account thats getting the assist achievement on the needler and pick both them up. Put another account on the turret aiming at the spawn point. Have the 3rd account jump off the ledge.
Now make sure to turn all 3 accounts vibration off in the setting or this will suck! Once that is done have it to where both accounts are firing the guns, your main account firing 2 needlers on opposite times to where 1 needler is always firing when the other has to reload. By doing this your account with the needlers will ALWAYS GET THE ASSISTS. Now you basically have your hands full at this moment so im going to help it to where you can have it run on its own and you can do anything you want not involving your xbox one (like how im writing this solution as im getting this achievement). You are going to want to have 2 or 3 rubberbands and you are going to want to rubberband your controllers shooting exactly how instructed above or in the video.
Now your going to have to keep an eye on your controllers to make sure they don't shut off, thats your only job, other then that sit back and relax, watch a movie or something, if a controller turns off, turn it back on and hit the
button and its back to doing its work.2 controllers and 1 friend or 1 controller and friend with 2 controllers:
Now if you cannot get 3 controllers in any possible way then having 2 and a friend or 1 and a friend with 2 is also possible. Since you need 2500 headshots and 2500 assists 1 can get assists while the other gets headshots, the simple way of doing it is the same as the above method but both players have duel pistols, 1 person shooting the body while the other shoots the head, then when either of you guys get the achievement just alternate. Make sure to swap firing
to make it go faster for both of you, reloading less frequently which helps a ton!
Doing the 2 methods with 3 controllers is much faster, but with a friend and 3 total controllers is still fast! If you have any questions or concerns feel free to message me or comment.
Good luck and have fun!